Finding the Fourth Proportional to 100,738.42, 139,023.72 and 58,288.74

Step by Step Solution

1. Step 1: Write the proportion equation
   100,738.42 : 139,023.72 = 58,288.74 : x
2. Step 2: Convert to fraction form
   100,738.42/139,023.72 = 58,288.74/x
3. Step 3: Cross multiply
   100,738.42x = 139,023.72 × 58,288.74
4. Step 4: Simplify right side
   100,738.42x = 8,103,517,468.91
5. Step 5: Solve for x
   x = 8,103,517,468.91/100,738.42
6. Step 6: Final answer
   x = 80,441.18